PLEASE DO NOT TOUCH THE MICROSCOPES AT YOUR DESKS!!!

PLEASE DO NOT TOUCH THE MICROSCOPES AT YOUR DESKS!!!

# 1 Name of Part Arm Supports upper parts of microscope Base Supports the microscope 2 3 4 5 Description On/Off Switch Light Source Ocular Lens (eyepiece) 6 Body Tube (Always carry with one hand on arm and one hand on base!) If plugged in to power source, this switch will turn light source on Provides light, making your specimen easier to see The lens you look through, 10x magnification (enlarges the image of your specimen 10 times its actual size) Connects the ocular lens to the objective lenses

7 8 9 10 11 4x Objective Lens 10x Objective Magnifies your specimen 10 times its actual size Lens 40x Objective Magnifies your specimen 40 times its actual size Lens 100x Objective Highest power objective lens, magnifies your Lens specimen 100 times its actual size Revolving Nosepiece 12 Stage 13 Lowest power objective lens, magnifies your specimen 4 times its actual size (When observing a specimen, always focus your image using the 4x objective FIRST!) Holds objective lenses and rotates to allow you to change your objective lens Where slide is placed (Always make sure the stage is set to its lowest point when you begin to use a microscope) Coarse Focuses the image of your specimen by moving the stage up Adjustment and down (Never use this knob when your objective lens is Knob set to 40x or 100x. This could cause you to crack the slide)

14 15 Fine Adjustment Knob Diaphragm Also focuses the image of your specimen, but used when your objective lens is set to 40x or 100x. This knob moves the stage up and down much slower than the coarse. Allows light from the light source through to your specimen.

Preparing a Wet Mount

Preparing a Wet-Mount 1. Locate and cut out the letter “d” from a magazine (small print & lower-case). 2. Using forceps, place the “d” in the center of a slide. 3. Add one drop of water from a dropper, covering the paper completely. 4. Carefully place one edge of a cover slip to the side of the water drop and lower it onto the “d” at an angle. 5. Let any air bubbles escape. Be sure there is no excess water left on the top of the cover slip.